Four out of five people support a law banning smoking in all enclosed workplaces, a survey revealed today.

The poll of more than 4,000 people for Action on Smoking & Health found that 80% backed an end to second-hand smoke in pubs, restaurants and offices.

The findings also disputed claims by Health Secretary John Reid that the "middle classes" were "obsessed" with the smoking issue. The Mori poll found most people from all social classes were in support of smoke-free workplaces, ranging from 86% in the most wealthy group to 72% in more deprived areas.